Door-lock.



T. A. SPRADLBY.

DOOR LOOK.

APPLICATION FILED SEPT. 16, 1913.

1,130,034, Patented Mar. 2, 1915.

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MINIMUM HmIWUNUIIIWIHWHUWHHWHHWIWW 2 *5 ,'/6 3 17 1 O l 2 Q JQmHIIHIHUHHH I I H UHHIIIQHJHIIIIllIIHHIIHIHHHIHWjHHHH .a'rnr EXTHADIJEUS A. SPEADLEY, OF CROZEW'ELL, ALABAMA.

DOOR-LOCK.

icense.

Specification of Letters Patent.

Patented Mar. 2, 1915.

Application filed September 16, 1913. Serial No. 780,111.

To all whom it may concern Be it known that l, Trnionnos A. SPRAD- er, acitizen of the United States, residing at Cropwell, in the county of St.Clair and State of Alabama, have invented new and useful Improvements inDoor-Locks, of which the following is a specification.

This invention relates to improvements in door locks and has particularapplication to a sliding door lock.

In carrying out the present invention, it is my purpose to provide asliding door lock which will embody among other features jaws pivotedupon a common center scissors fashion and movable to open and closedpoitions about such center, and a keeper adapted to be engaged by thejaws when the door equipped with the lock is moved to closed position.

It is also my purpose to provide a sliding door lock which will embracethe desired features of simplicity, efficiency and durability, one whichmay be manufactured and marketed at a minimum expense and one which maybe readily and conveniently operated.

lVith the above and other objects in view, the invention consists in theconstruction, combination and arrangement of parts hereinafter set forthin and falling within the scope of the claim.

In the accompanying drawing; Figure 1 is a view in side elevation of asliding door lock constructed in accordance with my present invention,one side plate of the casing being removed and the parts shown inlocking position. Fig. 2 is a sectional view on the line 22 of Fig. 1looking in the direction of the arrow Fig. 3 is a perspective view ofthe aws removed from the casing.

Referring now to the accompanying drawing in detail, the numeral 1designates a lock casing constructed of any suitable material andpreferably of rectangular outline. This casing is adapted to beconnected with a sliding door in any suitable manner and is providedinteriorly with a vertical plate 2 spaced apart from the forward endwall of the casing and in parallelism therewith, the forward end wallbeing formed with an entrance opening 3.

4, 5 designate the jaws of the lock each comprising arms 6, 7 offsetfrom each other and having the adjacent ends connected with a hub 8formed with a bore 9. The hub 8 of the jaw 5 has one face thereof cutout so as to receive the hub of the other jaw and when the jaws areassembledthe bores 9, 9 in the hubs thereof register with each other toreceive a horizontal pivot bolt 10 carried by one of the side walls ofthe casing 1 approximately centrally thereof. When the jaws areassembled, the rear arm 7 of the lower jaw 5 overlies the rear arm 7 ofthe upper jaw, while the arm 6 of the upper l overlies the similar armof the lower 5 incident to the arms of each jaw being offset from eachother and connected with the hub. The forward arms 6, 6 of the aws areadapted to work within a slot formed in the plate 2 and the confrontingfaces of such arms at the forward ends thereof are formed to providehooks 11, 11 coiperating with each other to receive and hold the arrowshaped head 12 of the stationary keeper 13. Sub

stantially inclosing the rear ends of the arms 7, 7 of the jaws is aU-shaped yoke 14 having the free end of the opposite limbs thereofoutturned to provide securing flanges 15, 15 whereby the yoke may befastened to one side wall of the casing 1. Projecting outwardly from theinterconnecting member of the yoke approximately centrally thereof is abarrel 15 within which is rotatably mounted a shank 16 carrying a cam 17disposed between the contacting edges of the arms 7 7 of the jaws andworking within cavities 18, 18 formed in such edges of the arms.Projecting outwardly from the opposite side of the cam 17 coaxial withthe shank 16 is a stud 19 rotatably mounted within a bearing carried bythe inner surface of the adjacent side wall of the casing andcotiperating with the barrel 15 to support the cam. Normally, the jawsare held in closed position and for this purpose I employ, in thepresent instance, a coiled spring 20 encircling a pin 21 carried by thecasing between the arms 6, 6 of the jaws immediately adjacent to thepivot point thereof, the opposite extremities of the spring 20 extendingoutwardly and bearing upon the outer edges of the arms 6, 6 of the jawsto hold the latter normally closed.

From the foregoing description taken in connection with the accompanyingdrawing, the construction, mode of operation and manner of employing myinvention will be readily apparent. When the door equipped with myimproved lock slides to closed position, the arrow head 12 of the keeper13 enters the casing by way of the opening 3 thereinand passes betweenthehooks 11,- 11 on the respective ends of the arms 6, 6 of the jaws 4:,5 and in passing the hooks I the jaws are swung about the pivot boltaction of the spring 20. As the jaws are against the action of thespring 20 so that Y swung 'to openposition 'the hooksll, 11 release--the keeper 13 thereby permitting the 'door to be slid to open position;The key ,is 'given further turnin'g movement so that the" same maybewithdrawn from theikey holein the casing and in such 'furtherfmove-'ment'the cam is restored to initial position thereby permitting thespring to react and throw the jaws to normal.

While I have herein shown and described I 1 one preferred form of myinvention by way i of illustration, I wish it to be understood that I donot limit or confine myself to the precise details of constructionherein described and:delineated,las modification and Goples of thispatent may be obtained for five cents each, by 'addressing Washington,D. G.

variation bemade within-the scope of j V the claim without departingfrom the spirit ofthe invention. 7

I claim:

In a sliding door lock, jaws pivoted upon a common center, scissorsfashion, and movable to open and closed positions, and ,each

comprising armsoffset from each other and a hub interconnecting saidarms and formed with a bore adaptedjto 'aline withithe bore in the otherhub, a pivot bolt passed through said aliningboreaa cam mounted-betweenthe arms of said jaws and adapted to be rotated to swing the jawsto openposition, a spring-connected :t o, the'remaining arms r of the jaws; andholding the latter. in closed position, al'shank onisaid cam, a ;U- s'haped r yoke extending over 'thec'am end of said arms, a barrel fixed tothelnterconnectlng member of said yoke and extending, out-' andreceiving the latter, hooks formed "on the confronting faces oftheispring actuated arms of the jaws,'and a keeper' adapted to I beengaged by said hooks. i

InItestimony whereof I affix my signature 1n presence of-two witnesses.

' \Vitnes'ses: V J. D. Memos,

W. N. MADnox.

wardly therefrom coaxial. with saidshank riannnus A. I SPRADLEY.

the Commissioner of Patents, v

